<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>练习1</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
    <script>
        let name = "张三";
        while(true){
            let name = "李四";
            console.log(name);    //李四    
            break;
        }
        console.log(name);      //张三
    </script>
</body>
</html>